行会特权表：等级差异化的配置驱动

local function bonus(actor, lv)
    if lv >= 5 then
        sendmsg(actor, 1, "额外掉落20%")
    end
    if lv >= 8 then
        sendmsg(actor, 1, "额外经验10%")   -- 散落的特权判断
    end
end

-- privileges.txt（策划直接编辑）：
-- 5 => drop_extra=20
-- 8 => exp_extra=10,shop_discount=5
local PRIV = loadPrivileges("privileges.txt")
local function dropBonus(actor, lv)
    local cfg = PRIV[bestLevel(lv)] or {}
    return cfg.drop_extra or 0      -- 配置驱动，改0处代码
end